See your life safe in one place with WDs My Passport Essential SE USB drive. It offers maximum storage capacity for all your important files, videos, music, photos. With visual, automatic, continuous backup your data is backed up as soon as its changed. Maximum capacity. Maximum style. "The worlds most popular portable drive now features maximum capacity to store all your favorite videos, music, photos, and important files. Still sleek and compact, you can load it up and take it with you anywhere.WD SmartWare" See your life safe in one place.See your backup as it happens" Seeing is believing. Visual backup displays your content in categories and show the progress of your backup.Protect your data automatically ??" Relax, your data is secure. Automatic, continuous backup will instantly make a second copy whenever you add or change a file.Bring back lost files effortlessly ??" Retrieve your valuable data to its original location whether you've lost all your data or just overwritten an important file.Take control ??" Customize your backup, set drive security, run diagnostics, manage the power settings, and more from the WD SmartWare control center.Drive lock " Gain peace of mind knowing that your data is protected from unauthorized access or theft with password protection and military-grade 256-bit hardware-based encryption.Ready to plug-and-play with Windows PCs ??" if you're a Mac user, check out our Mac version of this product. [link to] USB 2.0 powered - Powered directly from the USB port on your PC. No separate power supply is needed*. An optional cable is available for the few computers that limit power from the USB port.Planet friendly ??" We designed a small box that uses recycled material and minimizes waste. We encourage you to recycle it. Formatted NTFS for Windows XP, Windows Vista, Windows 7 , Reformatting required for Mac OS X Tiger, Leopard, Snow Leopard